Tape-dispensing mechanism with knife-guarding means



Feb. 23, 1954 A. P. KRUEGER TAPE-DISPENSING MECHANISM WITH KNIFEGUARDING MEANS Filed March 11, 1949 5 She ets-Sheet 1 ATTORNEYS Feb. 23,1954 p KRUEGER 2,670,041

TAPEDISPENSING MECHANISM WITH KNIFE GUARDING MEANS Filed March ll, l9493 Sheets-Sheet 2 ATTORN EY5 Feb. 23, 1954 KRUEGER 2,670,041

TAPE.DISPENSING MECHANISM WITH KNIFE GUARDING MEANS 5 Sheets-Sheet ISFiled March 11, 1949 Patented Feb. 23, 1954 STATES OFFICE TKPEDISPENSING MECHANISMWITH GUARDING MEANS" Alfred; LP; Kruegcr;Stratfomdgflonn, 'assignor to Derby Sealers; Incorporated, Derby, Conn21- conporatiom of. Connecticut ApplicationMarcli I1, 194stseria1 No;8038 1? 13 Glaims; (Cl. MAJ-8.4.5)

This. inventiom relates to tapeedispensin'gz chines" amigo moreparticularly; to: a; device; for:

dispensingzpnessuressensitiwetape; WhiClIiS tackyorrclingazblci-uporraone side.v

AtIi-the:=przesent-; timez thenezare'. manw differentkinds ofpressureesensitivatape; some" of i which are: oil suelm at. character:that: they are readily SBVBIEGE ontornxoff agains'twteareoffrblade,while othersanesnelativelyzstrormgs anditough andi'requiize theeuse:oiii an'sharps: bladev that they may be severednasily'rand-zcleanlyw Asa matter of fact imthecdevices-of the:present. application: arazor: bladevisiieirminwediasithe:zteama off element 5 against whichnmvedi'totbev-severect. so that-a veryvslmarrr'severing'edgcfisprovided. It is: al.- wmyssdesiraltle to:shieidc-onrgnardithe' edgeof the: tearoff blane-s-so: thatzthezfingerszof; the operator.

OfithkldEXl-RB willxnoticomeitinxcontact witlm it;

and th s is particularly desirable where avery" sharp hiadeisnemplcyedg: on sthe-usermigh-t rreceive a; severezcutz It: is:contemplated: a by the present invention torpmvideaaignard orshieldzwhichwilt effectively: gnamdcthecuttingazedgetsof ther-tear-offiblade; but: whichrguardzwill he nmw-editoan inoperative pos-i-ptionmvhenthetape isdlzawn: toward the: hiade r50. asltozexpose? thelatter for contacttwith the taper; ASltaEB ofi'zthis cha racter has a"tendency toclingtbMEhBstEa'IIi-Off: blade; it is-desirahla to: providea:

stripper-torstripgthe:tape from; the bladeso that therewvilliba atzfreeproiectingqendu to bergrasped bsotliezfingersmfithe user. Inthepresenttdevice thekgnandiontheteareofi blade is mountedluponlopenatedu by: the; stripper member which is arranged? 110'. contact thenonetackyside of lthe tapeythecparts being-so constructed- .that whenthe tape is moved-. toward-ithetear-oftloladeioa: severance; the.zstripper 'member will he; engaged by the :none-tackyv-sidetof:the-=tape and will also beimovedt Thjsmovement of the strippermemhcr'zwill effect a retiring-movement of the guard.toexposewthesha-rp'e'dge of thetear off bladeand',

after: the'tape? has been: severed, the stripper.

member: will; strip: theileadingwend; of thetapev f rnm theiblade'anctmove: it to-a position in which thereawilltbe atfreerproj ecting'end-tube grasped byrthe: operatori Specifically, in the-presentconstruction vthe gnandtoii shield,fortthetearmfibladei's-.-.n:1onntedditectly uppn: apart: of the; stripper. memben so.

asqto beemoved' therebyand tthisiguardtisl properly guided in itsmovements.- so: that, whileit will: not

actually-contact the sharpzedgeot. the. blade and.

therefone ,w-ill -notudullithe latter it-willmoveim fnonttofithe :bladepnevent'contact fingers of the user therewith.

fine objec-taofthe present-invention is-to provide ans. intcprovedimachine: for dispensing;v pressures--- sensitive tapel Afurther objectoithcinventionisto provide-w machine for dispensing pressure sensitivetape hav ing.; :a-lsevering bladerand at guard normally shielding-saidblade aga-inst contact by thehand-1 of" the user;

Still another objeet of the invention is: topro tide-:a new-and improvedmachinefor dispens ng-:-

pressu're-sensitive tape, which machineisprovided with atfixed tear-offblade for the tape: and atmovable guardorshieldfor the: blade,whichmember: is carried.- by a str pping device. tostrip the tape:f-romtthe severingblade Fig Elisa detaillperspective view. of thestripper member" and k niie guard;

Eigm 6ii's aperspective view of the reel for sup.- portingthe. supplyroll t Fig.1 isairagmentary-sectional view on line 1-'Iiof1 .-i'gt I;

Fighliisi al-viewr similar to Fig. '7 showingga. sl'i'ght'lymodified"form of; my; device;

Eig,..9;i's an-view similar touFig... 8" showing, a furthermodification; and

Eig.,10 isia. fragmentary sectionalview on Iine' llTl lit ofiFig.. 9

To -.il1'ustrate av preferred embodiment of? my. irlventiomlhave shown atape-dispensing devicecomprising a supporting base- I Oftom which rises"astandardl l. A cas ng? is supported-on the standardl ill by; means ofThis. rod'istlireaded; into a boss I lofthe" casing" 41; passesl'ooselyi. through" the standard H and" receives. oriitszprojecting, enda clamping" nut 'l 5- so tli'atlthe case ma-y be clamped in easel 2.51sopenr'at" one side and is provided: with As'" shown more especiallynnFig? a second the threadedrod f3.

adjusted" rotatafile. position relativelyto th'e standard. The" rod orpin I7 is threaded into the boss I4, and rotatably mounted on this pinis a reel for holding the supply roll of tape ll, this reel comprisingin this instance a disk 13 and a hub It. This reel may be held in placeby a spring 29 disposed in a recess 2! in the hub I9, the spring beingheld under compression by the nut 22 threaded on the pin ii, and thusapplying friction to the reel to resist rotation thereof and preventbacklash at the end of a dispensing operation.

The hub I 9 is received in the opening in the spool 24 (Fig. 1) whichholds the supply roll of tape, and is designed to fit snugly within thisspool. However, the fit is sometimes sufiiciently loose so that, as thetape is pulled from the roll and the latter rotated thereby, there willbe some tendency for the supply roll of tape to turn relatively to thehub 19 and, in that event, the spool is apt to work off the hub, thatis, to gradually move in a direction away from the disk I 8 so that itmay not be properly aligned with the mechanism of the dispenser. It willbe noted, particularly from Figs. 3 and 6, that the hub or core I9 isknurled on its peripheral surface, as at 25, these knurlings beingdisposed spirally and given a lead in the proper direction so that ifthere is any rotation between the spool 24 and the core or hub [9, thespool will tend to move toward the disk 8. In other words, any rotationof the spool on the hub will cause the spool to screw onto the coreinstead of screwing oiT of the core. This maintains the supply spoolagainst the disk l8 and, therefore, in proper alignment with the rest ofthe mechanism regardless of whether there is a loose or tight fit of thespool upon the hub.

The front wall of thecase I2 is provided with an opening 21 throughwhich the free end 28 of the tape is adapted to be pulled, and, adjacentthe lower end of this opening, is mounted a roller 29 adapted to engagethe tacky side of the tape so that a free end will protrude from thecase to be grasped by the operator, as shown in Fig. 1.

Mounted adjacent the opening 2'! and adapted to engage the non-tackyside of the tape is a stripper member comprising a plate 30 pivoted tothe case at 3! and normally urged in a counter-clockwise direction, ashown in Fig. 1, by the spring 32. The movement of the stripper membermay be limited by an arcuate slot 33 therein, which slot receives a pin34 fixed to the case. Formed integrally with the plate-like member 35and extending laterally at the upper edge thereof is a member 35 havingat its forward ends depending ears 33 in which is rotatably mounted astripping roller 31 adapted to engage the non-tacky side of the tape,the normal position of this roller when the parts are at rest beingshown in Fig. 1.

Secured on the case at the upper edge of the opening 21, is a tear-01fblade 39 having a sharp front edge 40 projecting over the opening 21 soas to be in position to contact the non-tacky side of the tape after ithas been drawn from the roll. This blade may be held in position by aclamping plate 4|, which clamping plate may, as shown in Fig. 4, beprovided with forwardly projecting ears 42, one disposed at each side ofthe sharpened edge 40 of the blade 39, so as to shield the side edges ofthe blade. The edge of the blade, as will be noted, projects forwardlyfrom the plate 4| between these ears so that the tape may be drawn overthe sharp edge. Hinged to the laterally projecting member 35 of thestripper at the rear end thereof is a guard member 44. This guard memberis of plate-like form and is curved upwardly at its forward end as shownat 45 so that in its normal position of rest shown in Figs. 1 and 7, itprojects upwardly and forwardly of the sharp edge of the blade betweenthe ears 42, effectively shielding the blade against contact by thefingers. The hinge connection between this member and the member 35, asillustrated, comprises U-shaped projecting ears 46 at each side of themember 44, which ears embrace fingers 41 at the rear edge of the plate35.

The intermediate portion of the guard member 44 is disposed betweenupper and lower pins 48 and 49, the pins being spaced to form betweenthem a slot to receive the guard member and to act as guide for theguard member when it is moved from an operative to an inoperative orretracted position by movement of the stripper part 35. It will be seenfrom Fig. 1, for example, that the lower pin 49 supports the guardmember in the position shown and if the same were not present the guardmember would drop downwardly upon the part 35 of the stripper and exposethe edge of the knife.

The normal or rest position of the parts of the device is shown in Figs.land 7. It will be noted that the tape projects between the rollers 29and 31 so that a free end is presented to be grasped by the operator.While the roller 3! may not be in contact with the upper or non-tackysurface of the tape it will preferably be sufficiently close to theroller 29 in this position so that when the tape is stripped from the,severing blade, as-

will be hereinafter explained, it will be urged downwardly into contactwith the roller 29 so that this free end will always be presented to theuser.

In using the machine, the operator grasps the free end 28 of the tapeand draws it from the roll. When a suiiicient quantity of tape has beenunwound, the tape is moved upwardly toward the severing edge 40. Thismovement, through contact of the roller 31 with the surface of the tape,eifects movement of the stripper member from the position of Fig. l tothat shown in Fig. 3. Due to the hinged connection of the guard 44 withthe stripper member, the rear end of the guard member is likewise movedrearwardly and upwardly, thus causing the guard member to move from itsoperative position, shown in Fig. l, to a retracted or inoperativeposition, shown in Fig. 3. It will be seen that.

in this position of the parts, as shown in Fig.3, the tape may be drawnover the sharp edge 40 of the severing blade and severed.

Thereafter, the spring 32 will return the stripper member from theposition shown in Fig. 3 to that shown in Fig. l, and, likewise, theguard member will again be moved forwardly by the movement of thestripper. The movement of the guard member will be guided by the pins 48and 49 so that it will be moved to a position in front of the sharp edgeid of the severing blade. The stripping roller 37 will cause the tape tobe stripped from the severing blade and moved downwardly into contactwith the roller 29. It will be noted that the roller 3! contacts thetape at a substantial distance rearwardly of the line of severance sothat a free end will project forwardly of the rollers 29 and 31. i

In Fig. 8 of the drawing, I have shown a slight ly modified form of theinvention, wherein in stead of the guide pins or studs 48an'd 49, 'de-imov egoer other respects-this form ofilmy 'inventiom i's like' thatpreviously described and illustrated in Figs;-

guiding means feathe -guard member 'in 'its movements w and f'romoperative position;

A fiirther modification" of" my invention: is:

shown in Figs: 9- and 10"-whereinthe guard-mem bierT ll-ishinged to thestripper part 3 any meansof--"a*-hihgepih- 56 which passesthrough-eyes5"! provided upon theguard-member; and similar eye'm'embers"5B"-provide'd on" the-part 351* v coil spring 59surrounds=this spring" ping one end acting against the member and theother against the guard member *4 4 -soas." to normally; urge -t-hese'--members apart or urge" the guard member upwardly as shown: Fig. 9E

uppei guide member 6-0 is provided and. the spring 59 holds the guardmemberfial in'en gagement-with the-lcwen'surface of the'i member 6'02This guide= =member canbe provided 'in' any desirediorm; but, as shown;it" is 'providewby an integrally formed projection on: the upper-"wail?of the case l 2";

While--I have shown and described: some preferred embodiments: of myinvention; it"wiil" be under-stood'that'it'isnotto be limited to all ofthedetails shown, but is,capab1e,.of modification amtvari'ation withinthe spirit'of'the invention and within the: scope of" the claims.-

Whatil claim is:

l-. Ai-tape-rdispenser comprisingqa casing'ihawingsam opening throughwhich t'he' tape is; drawn, ai'severingablade supported by; the' casing;adiias cent; theropening, a guard fonthef: bladeshaving atfnee endnormally extending t-hrough the open;- mgr-between; the blade anctthe'tape to coverth'e blade, actuatingmeans fermovinggsaid guard-aimwandlyp and outwardly throughl'said openingtibeitween't-he tape and theblade; in ane'arcuate path; saidi means comprising;-ancactuatingtmemeber withinsthe casing .connectedrto said-guard member-*andt'adapted to.be :engaged by thesitape to be moved thereby as the latter is drawntoward the blade, and guide means engaging the guard at a point spacedfrom its connection with said actuating member to guide the guard insaid arouate path.

2. A tape dispenser comprising a casing having an opening through whichthe tape is drawn, means therein to support a roll of tape, a fixedsevering blade carried by the casing against which the tape may besevered, a stripper member movably mounted in the casing to strip thetape remaining on the roll from the severing blade, a guard membercarried by the stripper member and having a free end normally projectingthrough said opening to stand between the tape and the blade andforwardly of the edge of the blade, said stripper member having a partin contact with the tape as it issues from the roll, and means forguiding the free end of the guard member for movement between the knifeand tape and to an unguarded position below the knife upon movement'ofthe stripper member toward the blade.

It" will be" apparent that as the; spring SE -tends to-urge the guardmemben l l" upwardly no lower guide member-is necessary; It will beunderstood, that? the operation* of? the 6* 3% A tapedispensercomprisingrzarsupport. a roll 'of tap.e,-. a severing blader carriedbythe; support against: which thetap'e'. may besseveredg astripper. membermountedi lorrthe-support for? movement toward from'wthe biades toestriprthe-taperemaining on: the roll omith'e iseveringr blade; a guard member-Hinged itoi said stripper member tobe moved thereby' 't'owardcand' froma guarding position: with respect to the blttdbi and normally standingforwardly. of: the edgeof the blade and mean's for guiding the "guardmemher in its-movement.

4 A tape' dispenser comprising asupport' fbnfi a rolloftape, a severingbladecarried by the.

support ag-ainstwhioh the tape may beasevered}, as

stripper membermovablymounted on the sup port tostripthe -tape remainingon the roll frorm the severing blade,- and a guard 'memb'er 1 carried bysaid strip-per member 7 and having a free-"end? normally-"standingforwardly-oi the =edge= oi the blade and between theblade andthetapepath," said stripper member being engaged and-*moved by contact of thetapetherewith as it is drawn toward the severing-blade said' guardmembembeing moved to inoperative position by movement of-'*thestripper membertoward-- the-blade, and means-"for guidi'ngthe free end of thew guardmember for "movement between theknife and tapeand to anunguardedposition below the knife upon movement of the-stripper-member?5: A tape'dispenser comprising a' suppor-t' for a rollof tape; aseveringblade-carried-"bythe sup port against which the tape'--may-=be severed,a? stripper member" mounted on the supportfor movement toward and fromtheblade to-strip*the-' tape remaining on the rollf-ronr-theseverihgblade, a guard member hinged tosaidstripper member and-movabletherewith: to"and---from"a' guarding position with respect to"the-bladey said guardmem-ber normally standing forwardlyof the edgewfthe severing blade; and means to guide the guard member in itsmovement's? 6; A tapedispenser comprising a-support for a roll oftape;aseveri'ng blade carried by the-sup portr' against which the tapemay besevered; a

stripper member mounted" cm the supportfor movement toward and-- fromthe blade and having a part adapted to be engaged by thetape to effectmovement of thestripper member; a guard member" hinged to the" strippermember, said guard member projectingforwardly over-the edge' of the-blade and adapted to be movedhy the stripper member to-' expose theedge of theblade; and means to guide the guard member in its movements.

7. A tape dispenser comprising a support for a roll of tape, a severingblade carried by the support against which the tape may be severed, astripper member movably mounted on the support for movement toward andfrom the blade to strip the tape therefrom and having a part adapted tobe engaged by the tape to effect movement of the stripper member, aguard member hinged to the stripper member, said guard member projectingforwardly over the edge of the blade and adapted to be moved by thestripper member to expose the edge of the blade, and means to guide theguard member in its movements, said means comprising spaced elements oneupon each side of the guard.

8. A tape dispenser comprising a support for a roll of tape, a severingblade carried by the support against which the tape may be severed, astripper member movably mounted on the support for movement toward andfrom the blade a roll of tape, a severing blade carried by the supportagainst which the tape may be severed, a stripper member movably mountedon the support for movement toward and from the blade and having a partadapted to be engaged by the tape to effect movement of the strippermember, a guard member hinged to the stripper member, said guard memberprojecting forwardly over the edge of the blade and adapted to be movedby the stripper member to expose the edge of the blade, means to guidethe guard member in its movements comprising a guide element againstwhich the guard member engages, and spring means urging said guardmember against said element.

10. A tape dispenser comprising a support for a roll of tape, a severingblade carried by the support against which the tape may be severed, astripper member movably mounted on the support for movement toward andfrom the blade and having a part adapted to be engaged by the tape toeffect movement of the stripper member, a guard member hinged to thestripper member, said guard member projecting forwardly over the edge ofthe blade and adapted to be moved by the stripper member to expose theedge of the blade, means to guide the guard member in its movementscomprising a guide element against which the guard member engages, and aspring acting between the stripper member and the guard member to holdthe latter against said guide element.

11. A tape dispenser comprising a support for a roll of tape, a severingblade carried by the support against which the tape may be severed, astripper member mounted on the support for movement toward and from theblade and having a part adapted to be engaged by the tape to effectmovement of the stripper member, spring means to return said strippermember to normal position after the latter has been moved by engagementwith the tape, a guard member hinged to the stripper member, said memberprojecting forwardly over the edge of the blade and adapted to be movedby the stripper member to expose the edge of the blade and returned to aposition forwardly of the blade to guard the same and means to guidesaid'guard member in its movement.

12. A tape dispenser comprising a support for a roll of tape, a severingblade carried by the support against which the tape may be severed, astripper member movably mounted on the support for movement toward andfrom the blade and having a part adapted to be engaged by the tape toeffect movement of the stripper member, a guard member hinged to thestripper member, said guard member projecting forwardly over the edge ofthe blade and adapted to be moved by the stripper member to expose theedge of the blade, and means to guide the guard member in its movements,said means comprising spaced elements one upon each side of the guardand at least one of said elements being an antifriction roller.

13. A tape dispenser comprising a support for a roll of tape, a severingblade against which the tape may be drawn to be severed, means forsupporting said blade, astripper member mounted adjacent said blade formovement toward and from the blade to strip the tape therefrom after asevering operation, a guard member carried by the stripper member andnormally standing forwardly of the edge of the blade and being movedaway from the blade by movement of the stripper member, said guardmember being hinged to said stripper member and means to guide the guardmember in its movement.

ALFRED P. KRUEGER.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 1,397,927 Flick Nov. 22, 1921 1,525,012 Tinkham Feb. 3, 19252,052,541 Roberts et a1 Aug. 25, 1936 2,125,736 Murray Aug. 2, 19382,138,154 Grunwald Nov. 29, 1938 2,231,140 Richardson Feb. 11, 19412,233,361 Anderson et a1 Feb. 25, 1941 2,324,204 Fischer July 13, 19432,324,349 Atkins July 13, 1943 2,352,445 Pinckney June 2'7, 19442,434,776 Van Cleef et a1 Jan. 20, 1948 2,555,187 Erhardt May 29, 1951

